High-temperature superconductivity (onset Tc = 135 K) in K(0.2)Ba(0.5)Y(0.3)CuO(3-z)
Abstract
Observations of high-temperature superconductivity are reported for a K-substituted Ba-Y-Cu-oxide compound having the formula K(0.2)Ba(0.5)CuO(3-z). Sample tablets, sintered in oxygen at 1170 K for 10-120 hr and slowly cooled at 670 K in the furnace and then removed, were found to be metallic in character and were superconducting at 135 K. When the annealing time at 670 K was increased, the behavior of the samples became more metallic, and the superconductivity temperature increased to 145 K.
- Publication:
-
Journal of Materials Science Letters
- Pub Date:
- January 1988
- Bibcode:
- 1988JMSL....7...53K
- Keywords:
-
- Barium Compounds;
- Copper Oxides;
- Critical Temperature;
- High Temperature Superconductors;
- Potassium Compounds;
- Yttrium Compounds;
- Heat Treatment;
- Inert Atmosphere;
- Mixed Oxides;
- Sintering;
- Transition Temperature;
- X Ray Diffraction